动态TDD技术HARQ时序冲突的解决方案

发布时间：2018-02-14 06:16

本文关键词： 动态TDD 混合自动重传过渡无线帧时序冲突　出处：《电信科学》2017年05期 　论文类型：期刊论文

【摘要】：动态TDD技术的引入不仅能够很好地解决突发性业务需求增长较快的问题,还能提升小区通信系统的服务质量。在动态TDD系统中,无线帧配置可以通过系统中的负载量来改变。但是一些子帧可能会在重配后改变传输方向,导致一些HARQ进程出现时序冲突,影响系统性能。为了解决动态TDD系统中的HARQ时序冲突问题,提出了一种基于过渡无线帧的混合自动重传方案。当重配周期到来时,在重配点后增加一个过渡无线帧,使得HARQ时序以一种较简单、时序冲突较少的方式过渡到重配后的无线帧。在LTE系统仿真平台上建立HARQ模型进行性能验证,仿真结果表明,所提方案能有效地提升系统资源利用率,并给系统平均吞吐量带来增益。
[Abstract]:The introduction of dynamic TDD technology can not only solve the problem of rapid growth of sudden business demand, but also improve the quality of service of residential communication system. Wireless frame configuration can be changed by the amount of load in the system, but some subframes may change the direction of transmission after rematching, resulting in timing conflicts in some HARQ processes. In order to solve the problem of HARQ timing conflict in dynamic TDD system, a hybrid automatic retransmission scheme based on transition wireless frame is proposed. When the rematch period comes, a transitional wireless frame is added after the rematch point. The HARQ timing is transferred to the rematched wireless frame in a simple manner with less timing conflicts. The HARQ model is built on the LTE system simulation platform to verify the performance. The simulation results show that, The proposed scheme can effectively improve the system resource utilization and bring gains to the average throughput of the system.
【作者单位】：重庆邮电大学通信与信息工程学院;
【分类号】：TN929.5

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